By next year,he ( ) twenty years old.A will beB will have been 为什么B不行

He will go there by plane some day next year划线部分提问some day next year By next year,he ( ) twenty years old.A will beB will have been 为什么B不行 句型转换：He went there by plane.(some day next year) 句型转换：1.He went there by plane.(some day next year) He went there by plane.（some day next year）快 He will have learnt for 9 years by the time he __ (graduate) from the school next year. by the time he gratuades from high school next year, he will have learnt here for three years这个句子中前半段,为什么不用by the time he will gratuade from high school next year呢?不是将来的事吗? He ---(leave)for the USA next year. They finish the bridge next year（用 by the end of next year改写） He said that he will go abroad next year.可以说He says that he will go abroad next year吗? by this time next year 是啥意思? by next year和by the end of next year它们有没有区别?主句的时态一样不一样? 句型转换：1.I sometimes write to my mother in the evening.(tonight)2.He went there by play.(some day next year) By next year he ---in New York for five years.A has worked B has been working C works D will have worked Will he be able to buy a car next year l think so.He___(save)up for it for 3 years by then. Last year,he often heard Tom (sing) in next room Will he be twelve next year?作否定回答 翻译He will live in a tall apartment next year.